Suppose the supply for a certain textbook is given by 2 demand is given by p 20 where p is the price and q is the quantity The graph of these equations is shown to the right Find the equilibrium quantity and the equilibrium price D and and the equilibrium price is number as needed 20 16 12 8 4 c Set the two expressions for p equal to each other and solve for q OD Find where the supply equation is equal to 20 The equilibrium quantity is 0 0 6 8 10 Quantity 27 Q 2